Amazon launches 30-minute delivery in dozens of cities

Amazon is widening Amazon Now to major metro areas and dozens of additional U.S. cities.

The service promises delivery in 30 minutes or less for groceries, household essentials, and baby supplies.

Amazon Now runs 24 hours in most markets, does not require Prime, and offers lower fees for Prime members.

The expansion increases pressure on rapid-delivery and grocery rivals such as Instacart.